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<h1 class="title">mainwindow.cpp 示例文件</h1>
<span class="subtitle">itemviews/puzzle/mainwindow.cpp</span>
<!-- $$$itemviews/puzzle/mainwindow.cpp-description -->
<div class="descr"> <a name="details"></a>
<pre class="cpp">

  <span class="comment">/****************************************************************************
  **
  ** Copyright (C) 2016 The Qt Company Ltd.
  ** Contact: https://www.qt.io/licensing/
  **
  ** This file is part of the examples of the Qt Toolkit.
  **
  ** $QT_BEGIN_LICENSE:BSD$
  ** Commercial License Usage
  ** Licensees holding valid commercial Qt licenses may use this file in
  ** accordance with the commercial license agreement provided with the
  ** Software or, alternatively, in accordance with the terms contained in
  ** a written agreement between you and The Qt Company. For licensing terms
  ** and conditions see https://www.qt.io/terms-conditions. For further
  ** information use the contact form at https://www.qt.io/contact-us.
  **
  ** BSD License Usage
  ** Alternatively, you may use this file under the terms of the BSD license
  ** as follows:
  **
  ** &quot;Redistribution and use in source and binary forms, with or without
  ** modification, are permitted provided that the following conditions are
  ** met:
  **   * Redistributions of source code must retain the above copyright
  **     notice, this list of conditions and the following disclaimer.
  **   * Redistributions in binary form must reproduce the above copyright
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  ** $QT_END_LICENSE$
  **
  ****************************************************************************/</span>

  <span class="preprocessor">#include &quot;mainwindow.h&quot;</span>
  <span class="preprocessor">#include &quot;piecesmodel.h&quot;</span>
  <span class="preprocessor">#include &quot;puzzlewidget.h&quot;</span>

  <span class="preprocessor">#include &lt;QtWidgets&gt;</span>
  <span class="preprocessor">#include &lt;stdlib.h&gt;</span>

  MainWindow<span class="operator">::</span>MainWindow(<span class="type"><a href="qwidget.html">QWidget</a></span> <span class="operator">*</span>parent)
      : <span class="type"><a href="qmainwindow.html">QMainWindow</a></span>(parent)
  {
      setupMenus();
      setupWidgets();
      model <span class="operator">=</span> <span class="keyword">new</span> PiecesModel(puzzleWidget<span class="operator">-</span><span class="operator">&gt;</span>pieceSize()<span class="operator">,</span> <span class="keyword">this</span>);
      piecesList<span class="operator">-</span><span class="operator">&gt;</span>setModel(model);

      setSizePolicy(<span class="type"><a href="qsizepolicy.html">QSizePolicy</a></span>(<span class="type"><a href="qsizepolicy.html">QSizePolicy</a></span><span class="operator">::</span>Fixed<span class="operator">,</span> <span class="type"><a href="qsizepolicy.html">QSizePolicy</a></span><span class="operator">::</span>Fixed));
      setWindowTitle(tr(<span class="string">&quot;Puzzle&quot;</span>));
  }

  <span class="type">void</span> MainWindow<span class="operator">::</span>openImage()
  {
      <span class="keyword">const</span> <span class="type"><a href="../qtcore/qstring.html">QString</a></span> directory <span class="operator">=</span>
          <span class="type"><a href="../qtcore/qstandardpaths.html">QStandardPaths</a></span><span class="operator">::</span>standardLocations(<span class="type"><a href="../qtcore/qstandardpaths.html">QStandardPaths</a></span><span class="operator">::</span>PicturesLocation)<span class="operator">.</span>value(<span class="number">0</span><span class="operator">,</span> <span class="type"><a href="../qtcore/qdir.html">QDir</a></span><span class="operator">::</span>homePath());
      <span class="type"><a href="qfiledialog.html">QFileDialog</a></span> dialog(<span class="keyword">this</span><span class="operator">,</span> tr(<span class="string">&quot;Open Image&quot;</span>)<span class="operator">,</span> directory);
      dialog<span class="operator">.</span>setAcceptMode(<span class="type"><a href="qfiledialog.html">QFileDialog</a></span><span class="operator">::</span>AcceptOpen);
      dialog<span class="operator">.</span>setFileMode(<span class="type"><a href="qfiledialog.html">QFileDialog</a></span><span class="operator">::</span>ExistingFile);
      <span class="type"><a href="../qtcore/qstringlist.html">QStringList</a></span> mimeTypeFilters;
      <span class="keyword">for</span> (<span class="keyword">const</span> <span class="type"><a href="../qtcore/qbytearray.html">QByteArray</a></span> <span class="operator">&amp;</span>mimeTypeName : <span class="type"><a href="../qtgui/qimagereader.html">QImageReader</a></span><span class="operator">::</span>supportedMimeTypes())
          mimeTypeFilters<span class="operator">.</span>append(mimeTypeName);
      mimeTypeFilters<span class="operator">.</span>sort();
      dialog<span class="operator">.</span>setMimeTypeFilters(mimeTypeFilters);
      dialog<span class="operator">.</span>selectMimeTypeFilter(<span class="string">&quot;image/jpeg&quot;</span>);
      <span class="keyword">if</span> (dialog<span class="operator">.</span>exec() <span class="operator">=</span><span class="operator">=</span> <span class="type"><a href="qdialog.html">QDialog</a></span><span class="operator">::</span>Accepted)
          loadImage(dialog<span class="operator">.</span>selectedFiles()<span class="operator">.</span>constFirst());
  }

  <span class="type">void</span> MainWindow<span class="operator">::</span>loadImage(<span class="keyword">const</span> <span class="type"><a href="../qtcore/qstring.html">QString</a></span> <span class="operator">&amp;</span>fileName)
  {
      <span class="type"><a href="../qtgui/qpixmap.html">QPixmap</a></span> newImage;
      <span class="keyword">if</span> (<span class="operator">!</span>newImage<span class="operator">.</span>load(fileName)) {
          <span class="type"><a href="qmessagebox.html">QMessageBox</a></span><span class="operator">::</span>warning(<span class="keyword">this</span><span class="operator">,</span> tr(<span class="string">&quot;Open Image&quot;</span>)<span class="operator">,</span>
                               tr(<span class="string">&quot;The image file could not be loaded.&quot;</span>)<span class="operator">,</span>
                               <span class="type"><a href="qmessagebox.html">QMessageBox</a></span><span class="operator">::</span>Close);
          <span class="keyword">return</span>;
      }
      puzzleImage <span class="operator">=</span> newImage;
      setupPuzzle();
  }

  <span class="type">void</span> MainWindow<span class="operator">::</span>setCompleted()
  {
      <span class="type"><a href="qmessagebox.html">QMessageBox</a></span><span class="operator">::</span>information(<span class="keyword">this</span><span class="operator">,</span> tr(<span class="string">&quot;Puzzle Completed&quot;</span>)<span class="operator">,</span>
                               tr(<span class="string">&quot;Congratulations! You have completed the puzzle!\n&quot;</span>
                                  <span class="string">&quot;Click OK to start again.&quot;</span>)<span class="operator">,</span>
                               <span class="type"><a href="qmessagebox.html">QMessageBox</a></span><span class="operator">::</span>Ok);

      setupPuzzle();
  }

  <span class="type">void</span> MainWindow<span class="operator">::</span>setupPuzzle()
  {
      <span class="type">int</span> size <span class="operator">=</span> <a href="../qtcore/qtglobal.html#qMin">qMin</a>(puzzleImage<span class="operator">.</span>width()<span class="operator">,</span> puzzleImage<span class="operator">.</span>height());
      puzzleImage <span class="operator">=</span> puzzleImage<span class="operator">.</span>copy((puzzleImage<span class="operator">.</span>width() <span class="operator">-</span> size) <span class="operator">/</span> <span class="number">2</span><span class="operator">,</span>
          (puzzleImage<span class="operator">.</span>height() <span class="operator">-</span> size) <span class="operator">/</span> <span class="number">2</span><span class="operator">,</span> size<span class="operator">,</span> size)<span class="operator">.</span>scaled(puzzleWidget<span class="operator">-</span><span class="operator">&gt;</span>imageSize()<span class="operator">,</span>
              puzzleWidget<span class="operator">-</span><span class="operator">&gt;</span>imageSize()<span class="operator">,</span> <span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>IgnoreAspectRatio<span class="operator">,</span> <span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>SmoothTransformation);

      model<span class="operator">-</span><span class="operator">&gt;</span>addPieces(puzzleImage);
      puzzleWidget<span class="operator">-</span><span class="operator">&gt;</span>clear();
  }

  <span class="type">void</span> MainWindow<span class="operator">::</span>setupMenus()
  {
      <span class="type"><a href="qmenu.html">QMenu</a></span> <span class="operator">*</span>fileMenu <span class="operator">=</span> menuBar()<span class="operator">-</span><span class="operator">&gt;</span>addMenu(tr(<span class="string">&quot;&amp;File&quot;</span>));

      <span class="type"><a href="qaction.html">QAction</a></span> <span class="operator">*</span>openAction <span class="operator">=</span> fileMenu<span class="operator">-</span><span class="operator">&gt;</span>addAction(tr(<span class="string">&quot;&amp;Open...&quot;</span>)<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> <span class="operator">&amp;</span>MainWindow<span class="operator">::</span>openImage);
      openAction<span class="operator">-</span><span class="operator">&gt;</span>setShortcuts(<span class="type"><a href="../qtgui/qkeysequence.html">QKeySequence</a></span><span class="operator">::</span>Open);

      <span class="type"><a href="qaction.html">QAction</a></span> <span class="operator">*</span>exitAction <span class="operator">=</span> fileMenu<span class="operator">-</span><span class="operator">&gt;</span>addAction(tr(<span class="string">&quot;E&amp;xit&quot;</span>)<span class="operator">,</span> <a href="qapplication.html#qApp">qApp</a><span class="operator">,</span> <span class="operator">&amp;</span><span class="type"><a href="../qtcore/qcoreapplication.html">QCoreApplication</a></span><span class="operator">::</span>quit);
      exitAction<span class="operator">-</span><span class="operator">&gt;</span>setShortcuts(<span class="type"><a href="../qtgui/qkeysequence.html">QKeySequence</a></span><span class="operator">::</span>Quit);

      <span class="type"><a href="qmenu.html">QMenu</a></span> <span class="operator">*</span>gameMenu <span class="operator">=</span> menuBar()<span class="operator">-</span><span class="operator">&gt;</span>addMenu(tr(<span class="string">&quot;&amp;Game&quot;</span>));

      gameMenu<span class="operator">-</span><span class="operator">&gt;</span>addAction(tr(<span class="string">&quot;&amp;Restart&quot;</span>)<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> <span class="operator">&amp;</span>MainWindow<span class="operator">::</span>setupPuzzle);
  }

  <span class="type">void</span> MainWindow<span class="operator">::</span>setupWidgets()
  {
      <span class="type"><a href="qframe.html">QFrame</a></span> <span class="operator">*</span>frame <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qframe.html">QFrame</a></span>;
      <span class="type"><a href="qhboxlayout.html">QHBoxLayout</a></span> <span class="operator">*</span>frameLayout <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qhboxlayout.html">QHBoxLayout</a></span>(frame);

      puzzleWidget <span class="operator">=</span> <span class="keyword">new</span> PuzzleWidget(<span class="number">400</span>);

      piecesList <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qlistview.html">QListView</a></span>;
      piecesList<span class="operator">-</span><span class="operator">&gt;</span>setDragEnabled(<span class="keyword">true</span>);
      piecesList<span class="operator">-</span><span class="operator">&gt;</span>setViewMode(<span class="type"><a href="qlistview.html">QListView</a></span><span class="operator">::</span>IconMode);
      piecesList<span class="operator">-</span><span class="operator">&gt;</span>setIconSize(<span class="type"><a href="../qtcore/qsize.html">QSize</a></span>(puzzleWidget<span class="operator">-</span><span class="operator">&gt;</span>pieceSize() <span class="operator">-</span> <span class="number">20</span><span class="operator">,</span> puzzleWidget<span class="operator">-</span><span class="operator">&gt;</span>pieceSize() <span class="operator">-</span> <span class="number">20</span>));
      piecesList<span class="operator">-</span><span class="operator">&gt;</span>setGridSize(<span class="type"><a href="../qtcore/qsize.html">QSize</a></span>(puzzleWidget<span class="operator">-</span><span class="operator">&gt;</span>pieceSize()<span class="operator">,</span> puzzleWidget<span class="operator">-</span><span class="operator">&gt;</span>pieceSize()));
      piecesList<span class="operator">-</span><span class="operator">&gt;</span>setSpacing(<span class="number">10</span>);
      piecesList<span class="operator">-</span><span class="operator">&gt;</span>setMovement(<span class="type"><a href="qlistview.html">QListView</a></span><span class="operator">::</span>Snap);
      piecesList<span class="operator">-</span><span class="operator">&gt;</span>setAcceptDrops(<span class="keyword">true</span>);
      piecesList<span class="operator">-</span><span class="operator">&gt;</span>setDropIndicatorShown(<span class="keyword">true</span>);

      PiecesModel <span class="operator">*</span>model <span class="operator">=</span> <span class="keyword">new</span> PiecesModel(puzzleWidget<span class="operator">-</span><span class="operator">&gt;</span>pieceSize()<span class="operator">,</span> <span class="keyword">this</span>);
      piecesList<span class="operator">-</span><span class="operator">&gt;</span>setModel(model);

      connect(puzzleWidget<span class="operator">,</span> <span class="operator">&amp;</span>PuzzleWidget<span class="operator">::</span>puzzleCompleted<span class="operator">,</span>
              <span class="keyword">this</span><span class="operator">,</span> <span class="operator">&amp;</span>MainWindow<span class="operator">::</span>setCompleted<span class="operator">,</span> <span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>QueuedConnection);

      frameLayout<span class="operator">-</span><span class="operator">&gt;</span>addWidget(piecesList);
      frameLayout<span class="operator">-</span><span class="operator">&gt;</span>addWidget(puzzleWidget);
      setCentralWidget(frame);
  }

</pre>
</div>
<!-- @@@itemviews/puzzle/mainwindow.cpp -->
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